Film mount slide



Oct. 27, 1953 c. J. cADwELL ETAL 2,556,631

FILM MOUNT SLIDE Filed May 16, 1949 25 Clarence Jakdwell g'unk/[dam on/ Patented ct. 27, 1953 PATENT Nortier;

aria Freakin.

celu., e

corporation ot California Applicaties may 4 it, 1949, serieuse. '93,582 'i omini. (C1. 4o- 156i invention relates gene-fairy te improveincrire in mounts idr cut nini end redesigned pri: madly :is eri improved dieu t for nlm for use in stili picture projection machines either of the 'Single picture or stereoptieon type.

A 4eririeiiiai object er 'me present invention is te Viiiewide 'en improved meent rer edt nidi piez tures designed particularly f e'r use iii associe-y tion with the type of iilm having a series of equi# distantly spaced apertures along one or both edges, wherein the accurate placement of the f'iiin in the iiiduiitgmay be accomplished easily and Quickly vvliebyto effect the proper space ing of 'the `edges f the iilm from an enclosing cover frame.

Another object of "the invention fis' to provide an improved inea-ns l or mounting eut nim or the stereoptieeii type whereby tire nime upon the mount will be easily and quickly positioned `and preperiy spaced crie frein the other.

Still another object of the invention ris to pro= vide `an improved mount ferent iiln'i vx/'herein tlie i'llr'i is held in a prescribed position and maintained therein in 'uch a xaiin'e'r that eiipan= sion and contraction -of the iilrn rr'iay take plac as a result of changes' in atmospheric condi= tii's, Voi' 'fr other reasons, Without 'causing the -lfn to bulge or bulile, thereby 'eliminating the possibility of the pietureproiected from the nlm being crit of 'focus'i -Oth `abects and advantages of the linvene tion v4will become apparent as the Adesoription 'of th saine proceeds and the invention `will be best understood from a consideration o the fllotv'e ing detail description 'taken in connection with the accompanying drawing forming a part of the specification, with the understanding, however, that the invention is not to be limited to the exact details of construction Vshown and described since obvious modifications Wili occur to a person `skilled in the art.

the drawing: i

Figure ifis a view in elevation of a complete film mount constructed in `accordance with the prsent invention showing a iillfn therein.

Figure 2 is a view corresponding to Figure i but showing the front frame removed.

Figure 3 is a sectional view taken substantially on the line 3--3 of Figure l.

Figure 4 is a sectional view taken substantially on the line 4--4 of Figure 1 and at right angles to the section of Figure 3.

Figure 5 is a separated or exploded view of the mount and the film.

Figure 6 is a view in elevation of a stereopticon mount with a portion of the "front or cover frame removed.

Figure '7 is a Ysectiin'jial view taken vsubstaritially on the line l-l of Figure 6.

Figure 8 is a sectional View `'taken substantially on the line' 8-8 of Figure 6 and at right angles to the section of Figure '7.

In accordance with thev Vpresent invention "the mount comprises a base or back frame l0 and a frontor cover irame l l.

The base or back frame has an opening l2 therein over which is llaced the cut nlm, here designated genereiiy by the riuiiierer It.

The `present invention is designed for mornt= ing either bleek and white or lcolor non of die 35 size, 'wlii'cnis provided along its Jonglitudinal edges with the spaoedapitures lll which are disposed outside of the iield which registers the desired picture.

For convenience 'of description the edges or portone-ef the nn'njiii which trie rows er an; etures 1 4 are formed will be referred to as the iep and bottom edges and vdie adjacent perderl-V dicuier Iedges jwiii ce defined es `une side edges etnie fii'rri. needrdineiy, referring to Figure the toe and octtorriedees of tn'eni'm la are designated respectivay 15 and It while' nie side edges are Vdes)igiqiatjed |`1 'rire height eff the Vii/iridow' opening 12 is ee= cerdirrgiy 'slightly less than the' distance between the tepend'bcttoiri 'rows ci apertures It the width or the window opening is slightly' i'ess tiran tlievvidtli or jtlienlin between the side edges l1 es shown in Figuren Adjacent to either the top or bttii edge f the window opening l2, preferably tli top edge, the material of the back frair'e l0 is eittriided er pun-cned forwardly slightly te `iii vide' the ite idee cr spurs it widen are siiaee'd deert lengthwise of Atrie adjacrit edge of the opening", a distance corresponding to the distance betii'en a slctd tiv f the rilri `ap(ertiir. I4. Preieiebiyihe lugs er spurs is ere spaced so that when each "iglgd ih apitiii .i4 there will be ari unoccupied .aperture between the nies` as `shvfri and illsiitlieA lugs are yso positioned with respect to a side edge of the Window opening that the correct location of the film over the window opening is easily and quickly accomplished since the engagement of the lugs in any but the proper two openings would instantly show the error by failure of a side edge of the film to properly overlap a side of the opening.

The cover I l is of the same overall dimensions as the base or backing I0 and it also has a Window opening I9 of the same size as the opening I2.

vertical and lateral dimensions slightly greater than the height and width of the lm. The excess in the size of the recess in the back of the cover II over the size of the film is such as to permit the limits of expansion of the film without causing the latter to buckle and it is found that an excess of .015 for the recess over the maximum width and height of the nlm is suiicient to take care of -such changes.

The recess depth may be slightly greater than the thickness of the film, a depth of .008 being preferred. This depth is suflicient to accommodate films for taking color photographs as well as black and white ilrns,` the color picture films being slightly thicker than black and White.

It will, of course, be obvious that the forward projection of the lugs or spurs I 8 should not be greater than the thickness of the film or only slightly so, so as not to interfer with the close positioning of the cover over the lm and f.

against the face of the back frame I0. While the invention is not limited to any specific dimension as to the size of the openings or the size of the recess 20, the depth of such recess or the length of the lugs or spurs, a satisfactory length for the spurs is approximately .006.

The forward face of the back frame It, that is, the face against which the cover II is placed, is provided with a coating 2I of a suitable adhesive whereby when the cover frame I I is placed in position, after the adhesive has been suitably moistened or otherwise made ready, the cover frame will adhere tightly to the back frame and thus produce the finished mounted picture.

In the application of the invention to mounts back body is in the form of a relatively long sheet of material of suitable character as indicated at 22. Such sheet of material is provided with window openings 23 in properly spaced relation and adjacent to the top edges, preferably, of the window openings, the material is forwardly pressed to provide the pair of lugs or spurs 24 for engagement in two apertures 25 of a. film 26 placed over the window opening. The lugs yor spurs 24 are preferably located so as to engage in the second and fourth apertures 25 of the lm body, as a result of which the film will be properly located over the window and its side edges Wil1 overlap the frame backing body 22 to the y proper extent.

The cover for the stereo mount is designated 21. This may be in the form of a single sheet of the same dimensions as the back sheet 22 or it may be in the form of two separate frames, as preferred.

Considering the cover 21 as a single sheet, such cover is provided with a pair of window openings 28 in properly spaced relation to match the openings 23 when the sheets 22 and 21 are placed one over the other and each opening 28 has formed therearound in the rear face of the cover, the recess 29 of the same dimensions and for the same purpose as the recess 20 of the single type mount.

Upon the forward face of the sheet 22 each opening 23 is surrounded by a band of adhesive 30 for securing the cover in position.

From the foregoing it will be readily apparent that the present invention provides an improved cut film mount having two outstanding advantages over mounts of the type at present available. First, the projecting lugs or prongs engage in the sprocket Wheel holes I4 or 25 which are Secondly, the mount cover, being provided with a recess or depression around the window opening therein, of slightly larger dimensions than the lm which it receives, securely holds the iilm in position and at the same time permits the iilm to expand as necessary Without buckling.

In those types of mounts which are at present e the lm is glued to the base and then frames for securing the same 1n assembly with the picture sections.

CLARENCE J. CADWELL. FRANK M. ADAMSON.

References Cited in the le of this patent UNITED STATES PATENTS 

